The low ceiling and the use of lightweight materials make for a far more streamlined vehicle, which in turn requires only a modest electric motor: though engineers have not yet decided whether the Superbus will be powered by fuel cells or batteries, they estimate that it will be able to accelerate from rest to 100kph in a leisurely 36 seconds.
The future of the project is uncertain. Its intended route, a new transport link connecting Amsterdam with the northern city of Groningen, was recently scrapped by the Dutch government (although the Superbus was deemed the most feasible of all the options considered, which also included a maglev train). In spite of the setback, the project has since received an extra €7m ($9m) in government funding, plus €1m from Connexxion, a local bus company. The Superbus team's latest plan is to unveil a fully functional prototype at the Beijing Olympics in 2008.
Here is the Tuft university website on the superbus